Question about 2008 Toyota Prius

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Code B279A how to repair This DTC is output when the ECM detects errors in communication between the transponder key ECU assy and the ECM, or in the communication lines. This problem TDS line high fixations

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Abdalrahman

Posted on Aug 01, 2013

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TDS Communication Line High Fixation

Posted on Jul 05, 2018

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6ya6ya
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Posted on Jan 02, 2017

duane_wong
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SOURCE: dtc 12 engine speed(rpm) sensor circuit ecm toyota

The RPM sending unit circuit is not sending right data to the ecm.

Posted on Jul 22, 2010

dttech
  • 4803 Answers

SOURCE: i replaced the heater core

If you disconnected your battery for the heater core replacement, the computer is simply telling on you. You are SUPPOSED to disconnect it, but the computer is just a doggone tattle-tell. Simply clear the code and move on with your life. (If you are getting codes from the ECU, you obviously don't have a communication problem with the ECU)

Posted on Jan 18, 2011

rickyrt441
  • 4399 Answers

SOURCE: We have a toyota prado

Thanks for choosing FixYa and welcome to the site. You want to make sure the new computer is already reprogrammed for your car before you get it. You need to find out what computer number you had for your vehicle. You should be able to use the vin number to find out what is was. On most vehicles, you have to have it programmed first before it will work correctly in your vehicle. You can try calling a local dealership and asking them. You can also look ECU up on Google and call one of the companies that only deal with ECU's. They will be able to determine what computer you need and what needs done. If you have any questions, feel free to ask and thanks for using FixYa.

Posted on Apr 07, 2011

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I have trouble code for land cruiser 2010 model b2779 error code


This Diagnostic Trouble Code (DTC) is output when the Engine Control Module (ECM) detects errors in communication between the Transponder Key Electronic Control Unit (ECU) assembly and the ECM, or in the communication lines. However, you can also visit https://www.reliable-store.com and download the entire service manual for better understanding. It has all the information along with the diagrams which are really are helpful. Good day!

Mar 21, 2018 | Cars & Trucks

1 Answer

Hi i have a question about this faulty code b279a tds


B279A, Theft deterrent system, communication line high fixation.

Probable causes:
- Loose connection in harness wiring or connectors.
- Transponder key ecu assembly.
- ECM.
I advice you to please contact the qualified service personnel.

Nov 14, 2015 | 2012 Toyota Corolla L Sedan 1.8L 4-cyl....

2 Answers

Bought car at auction- no keys. Had key made at GM dealer. Programmed key- key works. Car wont start- Codes are P0633 and P1629. cannot clear codes


DTC P0633 : Theft Deterrent Key Not Programmed

When learning the pre-release password, as well as the challenge and response sequence, the engine control module (ECM) is placed in learn mode. DTC P0633 will set automatically as an indicator that the system is in learn mode and not as a fault indicator. Once the password and challenge/response are learned, learn mode will be exited when the engine is successfully started. At this point, the DTC will be cleared. If the ECM does not exit learn mode, P0633 will remain current and indicate a fault.
The "key" referenced in the DTC descriptor does not refer to the vehicle key. In this case, "key" is referring to the challenge response.
DTC P0633 requires a successful engine start to exit the learn procedure and clear the DTC. If an unrelated malfunction exists that causes engine starting to be disabled or otherwise unavailable, learn mode will not exit and DTC P0633 will remain current. In this situation, the cause of the inoperative engine starting must be corrected before diagnosing DTC P0633.
DTC P1629: Theft Deterrent Fuel Enable Signal Not Received
The theft deterrent module (TDM) sends the pre-release password to the engine control module (ECM) via the serial data circuit. The ECM then sends a challenge to the TDM. Both the ECM and TDM perform a calculation on this challenge. If the calculated response from the TDM equals the calculation performed by the ECM, the ECM will allow vehicle starting.
DTC P1629 is an indicator that the challenge response was not received within the required 2 second window. This does not necessarily indicate a fault is present with the TDM or ECM. Factors such as a long engine crank, a delay in the serial data communication, or B-codes set in the TDM will cause DTC P1629 to set. This DTC should not be used as a fault indicator, but rather as a symptom to assist in the diagnosis of these other systems.
Who checked the codes , you -dealer ? You need to have BCM checked for codes B - codes ! you need a up scale diagnostic scan tool for that , dealer Tech -2 !
DTC B3935 57 : Transponder Authentication Error
DTC B3976 46 : Unconfigured Transponder/Vehicle Configuration Not Programmed
DTC B3060 : Unprogrammed Transponder Identification Code Received
DTC B3055: No Transponder Modulation or No Transponder
DTC B3031: Security System Controller In Learn Mode

Aug 07, 2015 | 2006 Buick Lucerne

4 Answers

What isthe fualt code b279a


could you confirm as OBD code sbegin with a P and have 4 numbers

Jun 12, 2014 | 2008 Toyota Prius

1 Answer

Code u2100- u2105


U2100 - GM Type Network - Manufacturer Controlled DTC - Manufacturer Controlled Description CAN Bus Off (4L30-E Transmission) Conditions
Cause Key on and the TCM detected a loss of communication on either Communication Area Network (CAN) Bus line for one second

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U2103 - GM Type Network - Manufacturer Controlled DTC - Manufacturer Controlled Description CAN Bus Reset Counter Overrun (4L30-E Transmission)
Cause Key on and then the TCM detected a loss of communication on either CAN Bus line that exceeded 40 time out requirements


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U2104 - GM Type Network - Manufacturer Controlled DTC - Manufacturer Controlled Description CAN Bus Reset Counter Overrun (4L30-E Transmission)
Cause Key on and then the TCM detected a loss of communication on either CAN Bus line that exceeded 40 time out requirements
------------------
U2105 - GM Type Network - Manufacturer Controlled DTC - Manufacturer Controlled Description CAN Bus Error ECM (4L30-E Transmission) Conditions
Cause Key on and the TCM did not receive ECM messages for 1 second

BUT, THERE IS NO FAULT CODES RESULT FOR U2101 AND U2102
or you can ask the 24 hrs live technical support was multi-diag, they will like to help you, good luck

Aug 14, 2013 | 2005 Isuzu Ascender

1 Answer

What is code B2799


This Diagnostic Trouble Code (DTC) is output when the Engine Control Module (ECM) detects errors in communication between the Transponder Key Electronic Control Unit (ECU) assembly and the ECM, or in the communication lines. This DTC is also output when an engine start is attempted while the ECU communication ID between the transponder key ECU assembly and the ECM is different.
Possible causes Faulty Key Faulty transponder key amplifier Faulty Transponder Key Electronic Control Unit (ECU) Transponder key amplifier wire harness Faulty Engine Control Module (ECM)

Mar 02, 2013 | 2007 Lexus ES 350

1 Answer

My dad owns a 2003 CTS. While driving the car he gets the displayed message "starting disabled remove key" and the car shuts off. He puts the car in NEUTRAL and WITHOUT removing the key, starts the car...


STARTING DISABLED REMOVE KEY
Refer to Theft Systems Description and Operation in Theft Deterrent

STARTING DISABLED REMOVE KEY
The radio illuminates the STARTING DISABLED REMOVE KEY message when the VTD system has disabled the starting system. The radio receives a message from the theft deterrent control module via the serial data circuit requesting illumination.

Your best bet ,take it to Cadillac dealer and have it checked . Could have DTC'S - diagnostic trouble codes
DTC B1015
DTC B1016
DTC B3031
DTC B3055
DTC B3060
DTC B3090
DTC B3935
DTC B3976
DTC P1629
DTC P1630
DTC P1631

The theft deterrent module or the insturment cluster or the ECM is not seeing correct info.
The vehicle theft deterrent (VTD) system functions are provided by the theft deterrent control module. When an ignition key is inserted into the ignition lock cylinder and the ignition is switched ON, the transponder embedded in the head of the key is energized by the exciter coils surrounding the ignition lock cylinder. The energized transponder transmits a signal that contains its unique value, which is received by the theft deterrent control module. The theft deterrent control module then compares this value to a value stored in memory, learned key code. If the value is correct the theft deterrent control module sends a random generated number to the transponder, this is called a challenge. Both the transponder and the theft deterrent control module perform a calculation on the challenge, if the calculations match the theft deterrent control module sends the fuel continue password via the serial data circuit to the Engine control module (ECM). If either the transponders unique value or the calculation to the challenge is incorrect the theft deterrent control module will send the fuel disable password to the ECM via the serial data circuit. The components of the VTD system are as follows:
• Theft deterrent control module
• Engine control module (ECM)
• Ignition key (Transponder)
• Ignition lock cylinder
• Security indicator

Aug 08, 2017 | 2004 Cadillac CTS

2 Answers

Code b2799


Hello I happened to me a problem in my car check in the computer system and Dahr me On B2799 So how fittest Alco possible Chrahola Hza case and thank

Apr 28, 2010 | 2006 Toyota Camry

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